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Math
·
Advanced Math
·
Nonlinear functions
medium
An exponential function
f
is defined by
f
(
x
)
=
k
(
4
)
x
, where
k
is a positive constant. If
f
(
−
1
)
=
7
and
f
(
2
)
=
448
, what is the value of
k
?
A
8
B
28
C
7
D
27
An exponential function \(f\) is defined by \(f(x)=k(4)^x\), where \(… | Math SAT Question | Ronan SAT